# periodic boundary conditions along all three dimensions boundary p p p # Set neighbor skin variable neigh_skin equal 2.0*${_u_distance} variable neigh_skin equal 2.0*1 neighbor ${neigh_skin} bin neighbor 2 bin # create a supercell with cubic lattice (fcc, bcc, sc, or diamond) # using 10*10*10 conventional (orthogonal) unit cells variable latticeconst_converted equal 3.302343912422657*${_u_distance} variable latticeconst_converted equal 3.302343912422657*1 lattice bcc ${latticeconst_converted} lattice bcc 3.30234391242266 Lattice spacing in x,y,z = 3.3023439 3.3023439 3.3023439 region simbox block 0 10 0 10 0 10 units lattice create_box 1 simbox Created orthogonal box = (0 0 0) to (33.023439 33.023439 33.023439) 1 by 1 by 1 MPI processor grid create_atoms 1 box Created 2000 atoms using lattice units in orthogonal box = (0 0 0) to (33.023439 33.023439 33.023439) create_atoms CPU = 0.000 seconds variable mass_converted equal 180.9479*${_u_mass} variable mass_converted equal 180.9479*1 kim interactions Ta #=== BEGIN kim interactions ================================== pair_style kim MEAM_LAMMPS_HuangLiuDuan_2021_HfNbTaTiZr__MO_893505888031_002 pair_coeff * * Ta #=== END kim interactions ==================================== mass 1 ${mass_converted} mass 1 180.9479 # initial volume variable v equal vol # assign formula variable V0 equal ${v} # evaluate initial value variable V0 equal 36013.6300215875 variable V0_metal equal ${V0}/(${_u_distance}*${_u_distance}*${_u_distance}) variable V0_metal equal 36013.6300215875/(${_u_distance}*${_u_distance}*${_u_distance}) variable V0_metal equal 36013.6300215875/(1*${_u_distance}*${_u_distance}) variable V0_metal equal 36013.6300215875/(1*1*${_u_distance}) variable V0_metal equal 36013.6300215875/(1*1*1) variable V0_metal_times1000 equal ${V0_metal}*1000 variable V0_metal_times1000 equal 36013.6300215875*1000 print "Initial system volume: ${V0_metal} Angstroms^3" Initial system volume: 36013.6300215875 Angstroms^3 # set the time step to 0.001 picoseconds variable timestep_converted equal 0.001*${_u_time} variable timestep_converted equal 0.001*1 timestep ${timestep_converted} timestep 0.001 variable temp_converted equal 313.15*${_u_temperature} variable temp_converted equal 313.15*1 variable Tdamp_converted equal 0.01*${_u_time} variable Tdamp_converted equal 0.01*1 variable press_converted equal 0.0*${_u_pressure} variable press_converted equal 0.0*1 variable Pdamp_converted equal 0.1*${_u_time} variable Pdamp_converted equal 0.1*1 # create initial velocities consistent with the chosen temperature velocity all create ${temp_converted} 17 mom yes rot yes velocity all create 313.15 17 mom yes rot yes # set NPT ensemble for all atoms fix ensemble all npt temp ${temp_converted} ${temp_converted} ${Tdamp_converted} iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 313.15 ${temp_converted} ${Tdamp_converted} iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 313.15 313.15 ${Tdamp_converted} iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 313.15 313.15 0.01 iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 313.15 313.15 0.01 iso 0 ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 313.15 313.15 0.01 iso 0 0 ${Pdamp_converted} fix ensemble all npt temp 313.15 313.15 0.01 iso 0 0 0.1 # compute the time averages of pressure, temperature, and volume, respectively # ignore the first 5000 timesteps variable etotal_metal equal etotal/${_u_energy} variable etotal_metal equal etotal/1 variable pe_metal equal pe/${_u_energy} variable pe_metal equal pe/1 variable T_metal equal temp/${_u_temperature} variable T_metal equal temp/1 variable V_metal equal vol/(${_u_distance}*${_u_distance}*${_u_distance}) variable V_metal equal vol/(1*${_u_distance}*${_u_distance}) variable V_metal equal vol/(1*1*${_u_distance}) variable V_metal equal vol/(1*1*1) variable P_metal equal press/${_u_pressure} variable P_metal equal press/1 fix avgmyTemp all ave/time 5 20 100 v_T_metal ave running start 1000 fix avgmyPress all ave/time 5 20 100 v_P_metal ave running start 1000 fix avgmyVol all ave/time 5 20 100 v_V_metal ave running start 1000 # extract fix quantities into variables so they can be used in if-else logic later. variable T equal f_avgmyTemp variable P equal f_avgmyPress variable V equal f_avgmyVol # set error bounds for temperature and pressure in original metal units (K and bar) variable T_low equal "313.15 - 1.0" variable T_up equal "313.15 + 1.0" variable P_low equal "0.0 - 5.0" variable P_up equal "0.0 + 5.0" # print to logfile every 1000 timesteps thermo_style custom step etotal v_etotal_metal pe v_pe_metal temp v_T_metal vol v_V_metal press v_P_metal thermo 1000 # Run a simulation for at most 2000*1000 timesteps. At each 1000th time step, check # whether the temperature and pressure have converged. If yes, break. label top variable a loop 2000 run 1000 CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE Your simulation uses code contributions which should be cited: - OpenKIM Project: doi:10.1007/s11837-011-0102-6 @Article{tadmor:elliott:2011, author = {E. B. Tadmor and R. S. Elliott and J. P. Sethna and R. E. Miller and C. A. Becker}, title = {The potential of atomistic simulations and the {K}nowledgebase of {I}nteratomic {M}odels}, journal = {{JOM}}, year = 2011, volume = 63, number = 17, pages = {17}, doi = {10.1007/s11837-011-0102-6} } - OpenKIM potential: https://openkim.org/cite/MO_893505888031_002#item-citation CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 7 ghost atom cutoff = 7 binsize = 3.5, bins = 10 10 10 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 3.755 | 3.755 | 3.755 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 0 -16102.65 -16102.65 -16183.565 -16183.565 313.15 313.15 36013.63 36013.63 2399.8456 2399.8456 1000 -16018.325 -16018.325 -16098.425 -16098.425 309.99345 309.99345 36189.402 36189.402 -91.346572 -91.346572 Loop time of 92.4154 on 1 procs for 1000 steps with 2000 atoms Performance: 0.935 ns/day, 25.671 hours/ns, 10.821 timesteps/s, 21.641 katom-step/s 98.5% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 92.325 | 92.325 | 92.325 | 0.0 | 99.90 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.017171 | 0.017171 | 0.017171 | 0.0 | 0.02 Output | 9.2905e-05 | 9.2905e-05 | 9.2905e-05 | 0.0 | 0.00 Modify | 0.066316 | 0.066316 | 0.066316 | 0.0 | 0.07 Other | | 0.006898 | | | 0.01 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 4119 ave 4119 max 4119 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 128000 ave 128000 max 128000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 128000 Ave neighs/atom = 64 Neighbor list builds = 0 Dangerous builds = 0 if "${V_metal}>${V0_metal_times1000}" then "jump SELF unstable" if "${T}>${T_low} && ${T}<${T_up} && ${P}>${P_low} && ${P}<${P_up}" then "jump SELF break" print "flag: Temp = ${T}, Press = ${P}" flag: Temp = 311.747471722342, Press = -27.9281412394651 next a jump SELF top variable a loop 2000 run 1000 Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 7 ghost atom cutoff = 7 binsize = 3.5, bins = 10 10 10 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 3.755 | 3.755 | 3.755 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 1000 -16018.325 -16018.325 -16098.425 -16098.425 309.99345 309.99345 36189.402 36189.402 -91.346572 -91.346572 2000 -16005.549 -16005.549 -16085.967 -16085.967 311.22795 311.22795 36248.319 36248.319 -1754.1588 -1754.1588 Loop time of 96.0475 on 1 procs for 1000 steps with 2000 atoms Performance: 0.900 ns/day, 26.680 hours/ns, 10.412 timesteps/s, 20.823 katom-step/s 99.4% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 95.96 | 95.96 | 95.96 | 0.0 | 99.91 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.015636 | 0.015636 | 0.015636 | 0.0 | 0.02 Output | 7.2856e-05 | 7.2856e-05 | 7.2856e-05 | 0.0 | 0.00 Modify | 0.065465 | 0.065465 | 0.065465 | 0.0 | 0.07 Other | | 0.006223 | | | 0.01 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 4119 ave 4119 max 4119 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 129490 ave 129490 max 129490 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 129490 Ave neighs/atom = 64.745 Neighbor list builds = 0 Dangerous builds = 0 if "${V_metal}>${V0_metal_times1000}" then "jump SELF unstable" if "${T}>${T_low} && ${T}<${T_up} && ${P}>${P_low} && ${P}<${P_up}" then "jump SELF break" print "flag: Temp = ${T}, Press = ${P}" flag: Temp = 313.075094229389, Press = -5.80003235587113 next a jump SELF top variable a loop 2000 run 1000 Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 7 ghost atom cutoff = 7 binsize = 3.5, bins = 10 10 10 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 3.755 | 3.755 | 3.755 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 2000 -16005.549 -16005.549 -16085.967 -16085.967 311.22795 311.22795 36248.319 36248.319 -1754.1588 -1754.1588 3000 -16011.289 -16011.289 -16094.904 -16094.904 323.5977 323.5977 36200.015 36200.015 74.32043 74.32043 Loop time of 96.0843 on 1 procs for 1000 steps with 2000 atoms Performance: 0.899 ns/day, 26.690 hours/ns, 10.408 timesteps/s, 20.815 katom-step/s 99.4% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 95.997 | 95.997 | 95.997 | 0.0 | 99.91 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.016066 | 0.016066 | 0.016066 | 0.0 | 0.02 Output | 7.5551e-05 | 7.5551e-05 | 7.5551e-05 | 0.0 | 0.00 Modify | 0.065148 | 0.065148 | 0.065148 | 0.0 | 0.07 Other | | 0.006275 | | | 0.01 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 4119 ave 4119 max 4119 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 129544 ave 129544 max 129544 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 129544 Ave neighs/atom = 64.772 Neighbor list builds = 0 Dangerous builds = 0 if "${V_metal}>${V0_metal_times1000}" then "jump SELF unstable" if "${T}>${T_low} && ${T}<${T_up} && ${P}>${P_low} && ${P}<${P_up}" then "jump SELF break" jump SELF break # Write final averaged volume to file if temperature and volume have converged; otherwise wirte a # flag to indicate non-convergence. variable myStep equal step if "${myStep} < 2000000" then "print '${V}' file output/vol_T313.15.out" else "print 'not_converged' file output/vol_T313.15.out" print '${V}' file output/vol_T313.15.out 36193.679903105 print "LAMMPS calculation completed" LAMMPS calculation completed quit 0